A Kingston police spokeswoman said: "[Kingston Council's] children’s services and the police have been working closely with the family and other partners to fully investigate the circumstances of this tragic incident.

"An independent serious case review has been commissioned by the Local Safeguarding Children Board.

"This review is undertaken as standard procedure when a child dies in such tragic circumstances.

"As this is an ongoing review, we will not be discussing further at this stage."

Anyone with concerns regarding the safety of children should call 020 8547 5008.